The water tank does not appear to be that large, however the steamer will run for a good 15 or 20 minutes easily before refilling. We have a large finished basement with ceramic tile and it covers the whole area and still has water in the tank. I had a shark steamer and an H2O steamer and neither had the incredible steam time this unit has. The price is amazing for this steamer.

it holds about 2 cups. I can clean my kitchen & dining room floor, or laundry & hallway & bathroom before I have to add water. But you'd want to anyway, because the pad will get dirty. So I change the pad when I add more water.

I use distilled water due to the minerals in the tap water (Lake Mead). Most municipalities have minerals from their water source and utilize some levels of chemicals to treat the water so distilled water will likely work best.

Thank you everyone for your replies. In comparison to a number of steam floor cleaners and accessories, this one looks like the right fit. I've been meaning to upgrade the kitchen water purifier so handy to know too that is an option too.

Great question, Donna. This mop is designed for hard floors including vinyl and laminate. For your specific brand you may want to check with your flooring manufacturer for their recommended cleaning method.

My wife uses it on vinyl tiles and engineered wood flooring (basically a thin layer of hardwood as the top layer, which is meshed together with other materials pressed to it underneath). No issues. I would assume it's safe on Kardean vinyl wood flooring as well...

Good question however no it cannot - it's designed for hard floors only. For upholstery you'll want an extraction cleaner. Check out the SpotClean for this: http://www.bestbuy.com/site/bissell-spotclean-proheat-handheld-deep-cleaner-black-motley-blue/7902992.p

Great question - For laminate flooring we recommend using the PowerFresh on it's lowest steam setting but it's always a good idea to check with your flooring manufacturer for their recommended cleaning settings.

I used it on my laminate wood flooring. Just make sure you use the lowest setting for steam and do it quickly across the floor. You don't want to let it sit in one spot too long. I made my floors look brand new. No streaks!